Lunt 60mm H-alpha Solar Telescopes with 50mm Double Stack Filter - LS60THaDS50/ B600C
Complete H-alpha Solar Telescope with 60mm aperture and a additional 50mm Double-Stacked Etalon system. The telescope can be used with <0.75 Angstrom bandwidth or with <0.55 Angstrom bandwidth.
This telescope will be delivered with two matched Etalons, a internal one and a external. The LS60THaDS50 could be used only with the internal H-alpha filter at <0.75 Angstrom and a aperture of 60mm, or together with the front mounted external H-alpha filter at <0.55 Angstrom bandwidth and 50mm aperture.
The best views of the Sun are undoubtedly seen thru a dual etalon system. The reduction in bandwidth from an estimated 0.75 Angstrom to 0.5 Angstrom just seem to bring the Sun's surface to life. Adding a second etalon to an existing etalon is not quite as simple as it may seem. Both etalons need to be brought on line (matched) and both need to be adjustable (Tuning) such that all ghosts are eliminated. Ideally the transmission curves should overlap perfectly when on band to provide for the best possible resolution and contrast. Both etalons in this system will be matched at the factory in order to provide a system that is both optimized for performance and the elimination of ghosting.
The focal length of the telescope is 500mm, as Blocking Filter is used the B600. The star diagonal in which the blocking filter is installed, is equipped as standard for 1.25" eyepieces and with a T2 camera connection. Fine adjustment is achieved with a Crayford style focuser with 10:1 reduction standard.Technical data:
?Aperture: 60mm or 50 mm
?Focal length: 500 mm
?Bandwidth: <0.75 Angstrom or <0.55 Angstrom
?Tuning: tiltable Etalons
?Blocking Filter: B600 with 1.25" and T2 connection
?Focuser: Crayford-style with 10:1 reduction
?Weight: 3.6 kg
?Length: 46 cm